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