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