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