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