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