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