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