One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,6,9,5,8,14,16)(3,10,12,13,11,7,15,4)(17,18,23,27,24,30,21,29)(19,31,33,46,35,47,34,41)(20,28,36,45,37,26,22,38)(25,40,43,48,44,39,42,32)(1,3)(2,7)(4,9)(5,11)(6,12)(8,10)(13,16)(14,15)(17,19)(18,25)(20,32)(21,34)(22,39)(23,33)(24,35)(26,41)(27,43)(28,46)(29,42)(30,44)(31,38)(36,40)(37,48)(45,47) involution — undirected(1,4,6,10,5,13,14,7)(2,3,9,12,8,11,16,15)(17,20,23,36,24,37,21,22)(18,26,27,38,30,28,29,45)(19,32,33,40,35,48,34,39)(25,41,43,31,44,46,42,47)(3,11)(4,13)(7,10)(12,15)(17,21,24,23)(18,27,30,29)(19,33,35,34)(20,22,37,36)(25,42,44,43)(26,38,28,45)(31,41,47,46)(32,40,48,39)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.