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