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