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