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