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