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