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