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