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