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