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