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