One vertex per element, one color per generator, with an edge from x to x·s.
(2,4)(5,6,9,12)(7,10,14,18)(8,11,16,20)(13,17,15,19)(21,22,26,30,27,31,25,35)(23,24,33,36,34,32,29,28)(5,7)(6,10)(8,15)(9,14)(11,19)(12,18)(13,16)(17,20)(21,23)(22,28)(24,35)(25,33)(26,29)(27,34)(30,32)(31,36) involution — undirected(1,2,3,4)(5,8)(6,11)(7,13)(9,16)(10,17)(12,20)(14,15)(18,19)(21,24)(22,29)(23,30)(25,28)(26,36)(27,32)(31,33)(34,35)(8,16)(11,20)(13,15)(17,19)(21,22,25,35,27,31,26,30)(23,32,29,36,34,24,33,28)(6,12)(7,14)(11,20)(13,15)(21,25,27,26)(22,30,31,35)(23,29,34,33)(24,36,32,28)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.