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