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