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