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