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