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