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