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