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