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