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