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