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