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