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