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