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