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