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