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