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