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