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