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