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