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