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