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