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