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