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