One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,4,6)(3,5,7,8)(17,18,24,28)(19,21,22,25)(20,27,23,26)(29,30,32,31)(3,7)(5,8)(9,10)(11,15)(12,13)(14,16)(17,19)(18,25)(20,29)(21,28)(22,24)(23,32)(26,30)(27,31) involution — undirected(1,2)(3,5)(4,6)(7,8)(10,13)(14,15)(17,20,24,23)(18,26,28,27)(19,29,22,32)(21,31,25,30)(9,10)(11,14)(12,13)(15,16)(17,21,24,25)(18,19,28,22)(20,30,23,31)(26,32,27,29)(1,3)(2,5)(4,7)(6,8)(9,10)(11,14)(12,13)(15,16)(17,22,24,19)(18,25,28,21)(20,29,23,32)(26,31,27,30)(1,2)(3,5)(4,6)(7,8)(9,11,12,16)(10,14,13,15)(17,23,24,20)(18,27,28,26)(19,29,22,32)(21,31,25,30)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.