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