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