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