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