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