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