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