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