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