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