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