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