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