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