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