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