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