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