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