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