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