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