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)(19,29,30,31)(20,25,24,32)(21,27,22,26)(1,3,6,5)(2,7,10,9)(4,11,13,14)(8,15,16,12)(17,19)(18,24)(20,28)(21,32)(22,25)(23,30)(26,31)(27,29)(1,4)(2,8)(3,11)(5,14)(6,13)(7,15)(9,12)(10,16)(17,20)(18,19)(21,31)(22,29)(23,24)(25,26)(27,32)(28,30) involution — undirected(17,20)(18,25)(19,26)(21,29)(22,31)(23,24)(27,30)(28,32) 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.