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