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