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