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