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