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