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