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