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