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