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