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