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