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