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