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