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