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)(18,23)(19,26)(20,28)(30,31) involution — undirected(1,3)(2,5)(4,8)(6,7)(9,10)(11,14)(12,13)(15,16)(17,18,22,23)(19,21,26,24)(20,25,28,32)(27,31,29,30)(1,2)(3,6)(4,7)(5,8)(17,19,22,26)(18,24,23,21)(20,29,28,27)(25,31,32,30)(1,3)(2,6)(4,8)(5,7)(9,11,12,15)(10,14,13,16)(17,19)(18,21)(20,27)(22,26)(23,24)(25,31)(28,29)(30,32)(1,3)(2,5)(4,8)(6,7)(17,20)(18,25)(19,27)(21,31)(22,28)(23,32)(24,30)(26,29) involution — undirected(1,2)(3,6)(4,7)(5,8)(17,21)(18,19)(20,30)(22,24)(23,26)(25,29)(27,32)(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.