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