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