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