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