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