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