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