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