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