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