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)(17,18,22,26,21,23,20,30)(19,27,29,32,28,25,31,24)(1,3)(2,5)(4,8)(6,7)(10,13)(11,15)(18,23)(19,28)(26,30)(29,31) involution — undirected(9,11,12,15)(10,14,13,16)(17,19)(18,24)(20,29)(21,28)(22,31)(23,32)(25,26)(27,30)(2,6)(5,7)(10,13)(14,16)(17,19)(18,25)(20,31)(21,28)(22,29)(23,27)(24,26)(30,32) involution — undirected(3,8)(5,7)(17,20,21,22)(18,26,23,30)(19,29,28,31)(24,25,32,27)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.