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