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