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