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