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