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