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