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