One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,11)(4,9)(5,10)(6,7)(8,12)(13,14)(15,16)(17,18)(19,25)(20,24)(21,22)(23,27)(26,32)(28,30)(29,31)(33,34,38,41)(35,39,44,40)(36,37,46,48)(42,43,45,47)(2,7)(5,15)(8,11)(9,13)(18,21)(20,28)(23,25)(26,29)(33,35)(34,39)(36,45)(37,47)(38,44)(40,41)(42,46)(43,48) involution — undirected(3,12)(4,14)(8,11)(9,13)(17,19,22,27)(18,23,21,25)(20,29,28,26)(24,32,30,31)(33,35,38,44)(34,40,41,39)(36,45,46,42)(37,43,48,47)(1,3)(2,8)(4,10)(5,13)(6,12)(7,11)(9,15)(14,16)(17,19)(18,23)(20,26)(21,25)(22,27)(24,31)(28,29)(30,32)(33,35)(34,39)(36,42)(37,43)(38,44)(40,41)(45,46)(47,48) involution — undirected(1,4)(2,9)(3,10)(5,11)(6,14)(7,13)(8,15)(12,16)(17,20)(18,24)(19,26)(21,30)(22,28)(23,31)(25,32)(27,29)(33,36)(34,37)(35,42)(38,46)(39,43)(40,47)(41,48)(44,45) involution — undirected(1,5,6,15)(2,10,7,16)(3,13,12,9)(4,11,14,8)(17,21,22,18)(19,25,27,23)(20,30,28,24)(26,32,29,31)(33,37)(34,36)(35,43)(38,48)(39,42)(40,45)(41,46)(44,47)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.