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