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