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