One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,6)(4,7)(5,8)(9,11)(10,13)(12,14)(15,16)(17,18)(19,20)(21,29)(22,23)(24,31)(25,28)(26,32)(27,30)(33,34,38,42)(35,39,43,48)(36,40,46,45)(37,41,47,44)(2,3)(5,13)(7,9)(12,16)(17,19,22,25)(18,20,23,28)(21,30,31,26)(24,32,29,27)(35,43)(37,47)(39,48)(41,44)(4,11)(7,9)(12,16)(14,15)(18,23)(19,25)(24,29)(26,30)(33,35)(34,39)(36,41)(37,45)(38,43)(40,47)(42,48)(44,46) involution — undirected(1,3,6,2)(4,7,11,9)(5,10,13,8)(12,14,16,15)(17,20)(18,19)(21,27)(22,28)(23,25)(24,26)(29,30)(31,32)(33,35)(34,39)(36,41)(37,45)(38,43)(40,47)(42,48)(44,46)(1,4)(2,7)(3,9)(5,12)(6,11)(8,14)(10,15)(13,16)(17,18)(19,20)(21,24)(22,23)(25,28)(26,27)(29,31)(30,32)(33,36)(34,40)(35,44)(37,39)(38,46)(41,43)(42,45)(47,48) involution — undirected(1,5,6,13)(2,8,3,10)(4,12,11,16)(7,14,9,15)(17,21)(18,24)(19,26)(20,27)(22,31)(23,29)(25,30)(28,32)(33,37)(34,41)(35,45)(36,39)(38,47)(40,43)(42,44)(46,48)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.