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