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