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