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