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