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