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