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