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