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