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