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