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)(19,22)(20,25)(21,26)(23,24)(27,32)(28,30)(29,31)(33,34)(35,46)(36,39)(37,47)(38,43)(40,45)(41,44)(42,48) involution — undirected(4,11)(8,14)(10,15)(12,16)(17,19,23,27)(18,22,24,32)(20,28,29,21)(25,30,31,26)(33,35)(34,38)(36,47)(37,41)(39,48)(40,43)(42,44)(45,46)(2,7)(3,9)(8,14)(10,15)(18,24)(19,27)(20,29)(26,30)(33,36,40,44)(34,41,45,39)(35,47,43,42)(37,46,48,38)(1,3,6,9)(2,5,7,13)(4,10,11,15)(8,12,14,16)(17,20)(18,25)(19,28)(21,27)(22,30)(23,29)(24,31)(26,32)(33,37,40,48)(34,42,45,47)(35,41,43,39)(36,38,44,46)(1,4)(2,8)(3,10)(5,12)(6,11)(7,14)(9,15)(13,16)(17,21,23,28)(18,26,24,30)(19,29,27,20)(22,31,32,25)(33,38)(34,43)(35,45)(36,37)(39,47)(40,46)(41,42)(44,48)(1,5)(2,9)(3,7)(4,12)(6,13)(8,15)(10,14)(11,16)(17,22)(18,27)(19,24)(20,30)(21,25)(23,32)(26,29)(28,31)(33,39,40,41)(34,44,45,36)(35,48,43,37)(38,42,46,47)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.