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