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