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