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