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)(17,18,22,25)(19,23,29,34)(20,24,31,36)(21,26,32,38)(27,39,41,33)(28,35,42,45)(30,37,43,46)(40,47,48,44)(1,3,6,13)(2,7,10,16)(4,12,5,11)(8,15,9,14)(17,19)(18,23)(20,27)(21,28)(22,29)(24,33)(25,34)(26,35)(30,40)(31,41)(32,42)(36,39)(37,44)(38,45)(43,48)(46,47)(1,4,6,5)(2,8,10,9)(3,11,13,12)(7,14,16,15)(17,20)(18,24)(19,27)(21,30)(22,31)(23,33)(25,36)(26,37)(28,40)(29,41)(32,43)(34,39)(35,44)(38,46)(42,48)(45,47)(1,5,6,4)(2,9,10,8)(3,12,13,11)(7,15,16,14)(18,25)(23,34)(24,36)(26,38)(33,39)(35,45)(37,46)(44,47)(2,10)(7,16)(8,9)(14,15)(17,21,22,32)(18,26,25,38)(19,28,29,42)(20,30,31,43)(23,35,34,45)(24,37,36,46)(27,40,41,48)(33,44,39,47)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.