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