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