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