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