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