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