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