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)(17,18,22,26,23,20,21,25)(19,27,31,24,29,32,30,28)(1,3)(2,7,9,15)(4,12)(5,13)(6,11)(8,10,14,16)(17,19)(18,24)(20,28)(21,31)(22,30)(23,29)(25,32)(26,27)(3,11)(7,15)(10,16)(12,13)(17,20,23,18)(19,28,29,24)(21,25,22,26)(27,31,32,30)(19,29)(24,28)(27,32)(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.