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