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