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