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)(22,26)(27,33)(28,34)(35,36)(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)(23,27)(24,28)(25,26)(29,35)(30,33)(31,36)(32,34) 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)(22,27,26,33)(24,31,32,29)(28,36,34,35)(5,6)(7,10)(8,11)(9,13)(12,15)(14,17)(16,18)(19,20)(21,24,25,32)(22,28,26,34)(23,29,30,31)(27,35,33,36)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.