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