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