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