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)(18,19)(23,25)(24,26)(31,32) involution — undirected(2,7)(4,15)(8,11)(10,13)(17,18,22,19)(20,23,28,25)(21,24,30,26)(27,31,29,32)(33,34,39,37)(35,42,36,40)(38,41,46,45)(43,48,44,47)(2,7)(3,12)(9,14)(10,13)(33,35,39,36)(34,40,37,42)(38,43,46,44)(41,47,45,48)(1,3,6,12)(2,8,7,11)(4,10,15,13)(5,14,16,9)(17,19,22,18)(20,23,28,25)(21,26,30,24)(27,31,29,32)(33,36,39,35)(34,40,37,42)(38,44,46,43)(41,47,45,48)(1,4)(2,9)(3,13)(5,11)(6,15)(7,14)(8,16)(10,12)(17,20,22,28)(18,23,19,25)(21,29,30,27)(24,32,26,31)(33,37,39,34)(35,42,36,40)(38,41,46,45)(43,47,44,48)(1,5,6,16)(2,10,7,13)(3,14,12,9)(4,8,15,11)(17,21,22,30)(18,24,19,26)(20,27,28,29)(23,31,25,32)(33,38)(34,41)(35,43)(36,44)(37,45)(39,46)(40,47)(42,48)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.