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