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