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