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